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• 31. [Article] Object Watershed Link Simulation (OWLS)

  Object Watershed Link Simulation (OWLS) is a physically based watershed model. In the OWLS model, a watershed is defined as a three-dimensional object with linkages between cells and their attributes (e.g., ...

  Citation × Citation Citation Abstract Copy Title: Object Watershed Link Simulation (OWLS) Author: Chen, Huaisheng Object Watershed Link Simulation (OWLS) is a physically based watershed model. In the OWLS model, a watershed is defined as a three-dimensional object with linkages between cells and their attributes (e.g., area, slope, soil type, etc.). A cell is defined as the linkages of edges and their attributes (e.g., length, slope, etc.) and an edge is defined as the linkage of nodes and their attributes (e.g., depth of soil, elevation). The watershed hydrologic components such as water depth, surface flow, etc., are features associated with the cells, edges and nodes of a watershed. Simulation of hydrologic processes across a watershed involves the calculation of flows and water balances for these cells, edges, and nodes and their linkages. Therefore, the OWLS model is a three-dimensional, object-linked, vector-based model. OWLS includes four sub-models that focus on (1) Data Processing, (2) Geomorphology, (3) Hydrology and (4) Visualization. The Data Processing Model handles conversions of raw data from watershed surveys into OWLS format. It also handles missing data interpolation and extrapolation for air temperature, precipitation, and streamflow. The Geomorphologic Model handles the automatic watershed delineation for flowpaths, streams, and boundaries, as well as stream geometry and macropore geometry. The Hydrologic Model handles water balance, flow calculation and flow routing for the canopy, surface, subsurface and macropore system associated with each cell. The Visualization Model handles 3-D watershed projection, 2-D watershed projection, hydrograph presentation, and 3-D dynamic watershed animation for simulated flows and other hydrologic components of the Hydrologic Model. The OWLS model was tested with data from the Bear Brook Watershed of Maine (BBWM). Results from parameter calibration and validation indicate that the model generally provided good estimation of streamflows for rain-based flood events and unstable estimations for rain-on-snow events or snowmelt-based events when air temperature was high. Title: Object Watershed Link Simulation (OWLS) Author: Chen, Huaisheng Object Watershed Link Simulation (OWLS) is a physically based watershed model. In the OWLS model, a watershed is defined as a three-dimensional object with linkages between cells and their attributes (e.g., area, slope, soil type, etc.). A cell is defined as the linkages of edges and their attributes (e.g., length, slope, etc.) and an edge is defined as the linkage of nodes and their attributes (e.g., depth of soil, elevation). The watershed hydrologic components such as water depth, surface flow, etc., are features associated with the cells, edges and nodes of a watershed. Simulation of hydrologic processes across a watershed involves the calculation of flows and water balances for these cells, edges, and nodes and their linkages. Therefore, the OWLS model is a three-dimensional, object-linked, vector-based model. OWLS includes four sub-models that focus on (1) Data Processing, (2) Geomorphology, (3) Hydrology and (4) Visualization. The Data Processing Model handles conversions of raw data from watershed surveys into OWLS format. It also handles missing data interpolation and extrapolation for air temperature, precipitation, and streamflow. The Geomorphologic Model handles the automatic watershed delineation for flowpaths, streams, and boundaries, as well as stream geometry and macropore geometry. The Hydrologic Model handles water balance, flow calculation and flow routing for the canopy, surface, subsurface and macropore system associated with each cell. The Visualization Model handles 3-D watershed projection, 2-D watershed projection, hydrograph presentation, and 3-D dynamic watershed animation for simulated flows and other hydrologic components of the Hydrologic Model. The OWLS model was tested with data from the Bear Brook Watershed of Maine (BBWM). Results from parameter calibration and validation indicate that the model generally provided good estimation of streamflows for rain-based flood events and unstable estimations for rain-on-snow events or snowmelt-based events when air temperature was high. Close

• 32. [Article] An analysis of two adjacent agricultural watersheds in west central Oregon

  Two small adjacent watersheds on the west-central edge of the Willamette Valley of western Oregon were studied. Information was gathered on existing conditions to determine the suitability of the two watersheds ...

  Citation × Citation Citation Abstract Copy Title: An analysis of two adjacent agricultural watersheds in west central Oregon Author: Schoeneberger, Philip James Two small adjacent watersheds on the west-central edge of the Willamette Valley of western Oregon were studied. Information was gathered on existing conditions to determine the suitability of the two watersheds for a paired-watershed study design. A soil survey was conducted using slightly modified soil series previously established for the area. Distributions of the major soil series in the two watersheds were compared. Four transects were sampled using extracted soil cores and hand augering. Results of the transects closely paralleled pre-existing geomorphic schemes. Land-use patterns of the two watersheds were identified and compared. Streamflow and suspended sediment levels of the two watersheds were monitored and the effects of eight storms were compared. The soil survey revealed more diversity in the number of major soil series and greater percentages of heavier textured soils in watershed D3. Most of its forestland occurred on heavy textured soils, whereas most of the forestland in watershed 04 occurred on moderate textured soils. Watershed D3 had almost twice the percentage of cultivated wheatland as watershed D4, whereas D4 had greater percentages of area in grassland. These differences suggest that the soils of D3 might have lower infiltration and permeability than the soils of D4, conditions which are more conducive to lower baseflows and greater runoff and erosion. D3 has a fairly extensive tile drain network and D4 has three settling basins. The impact of these management structures is not apparent. Streamflow, suspended sediment levels, and precipitation for eight storms were compared. Comparisons of hydrographs indicated different response times in storm hydrograph rise for D3 and D4. Determination of these delay factors and adjusting streamflow values accordingly revealed a highly significant relationship between the streamflow levels, indicating a consistent hydrologic relationship between D3 and D4. D3 had consistently lower baseflow levels than D4. Comparisons of suspended sediment levels revealed consistently higher sediment levels in D3 which resulted in greater total yields in all eight storms. These results indicate an unequal but consistent hydrologic relationship between the two watersheds and that they are suitable for a paired-watershed study design. Title: An analysis of two adjacent agricultural watersheds in west central Oregon Author: Schoeneberger, Philip James Two small adjacent watersheds on the west-central edge of the Willamette Valley of western Oregon were studied. Information was gathered on existing conditions to determine the suitability of the two watersheds for a paired-watershed study design. A soil survey was conducted using slightly modified soil series previously established for the area. Distributions of the major soil series in the two watersheds were compared. Four transects were sampled using extracted soil cores and hand augering. Results of the transects closely paralleled pre-existing geomorphic schemes. Land-use patterns of the two watersheds were identified and compared. Streamflow and suspended sediment levels of the two watersheds were monitored and the effects of eight storms were compared. The soil survey revealed more diversity in the number of major soil series and greater percentages of heavier textured soils in watershed D3. Most of its forestland occurred on heavy textured soils, whereas most of the forestland in watershed 04 occurred on moderate textured soils. Watershed D3 had almost twice the percentage of cultivated wheatland as watershed D4, whereas D4 had greater percentages of area in grassland. These differences suggest that the soils of D3 might have lower infiltration and permeability than the soils of D4, conditions which are more conducive to lower baseflows and greater runoff and erosion. D3 has a fairly extensive tile drain network and D4 has three settling basins. The impact of these management structures is not apparent. Streamflow, suspended sediment levels, and precipitation for eight storms were compared. Comparisons of hydrographs indicated different response times in storm hydrograph rise for D3 and D4. Determination of these delay factors and adjusting streamflow values accordingly revealed a highly significant relationship between the streamflow levels, indicating a consistent hydrologic relationship between D3 and D4. D3 had consistently lower baseflow levels than D4. Comparisons of suspended sediment levels revealed consistently higher sediment levels in D3 which resulted in greater total yields in all eight storms. These results indicate an unequal but consistent hydrologic relationship between the two watersheds and that they are suitable for a paired-watershed study design. Close

• 33. [Article] Middle Cow Creek Watershed assessment and action plan

  The Middle Cow Creek Watershed Assessment process has been contributed to by a group of local landowners. The group met fifteen times to review data about their watershed going into the document and portions ...

  Citation × Citation Citation Abstract Copy Title: Middle Cow Creek Watershed assessment and action plan Author: Kincaid, Heidi The Middle Cow Creek Watershed Assessment process has been contributed to by a group of local landowners. The group met fifteen times to review data about their watershed going into the document and portions of the watershed assessment. Members of the Middle Cow Creek landowner group represented private landowners, private industrial timber companies, rural residents, the City of Glendale, the Bureau of Land Management Medford District (BLM), the Oregon Department of Forestry, the UBWC, and the Oregon Department of Environmental Quality (DEQ). Title: Middle Cow Creek Watershed assessment and action plan Author: Kincaid, Heidi The Middle Cow Creek Watershed Assessment process has been contributed to by a group of local landowners. The group met fifteen times to review data about their watershed going into the document and portions of the watershed assessment. Members of the Middle Cow Creek landowner group represented private landowners, private industrial timber companies, rural residents, the City of Glendale, the Bureau of Land Management Medford District (BLM), the Oregon Department of Forestry, the UBWC, and the Oregon Department of Environmental Quality (DEQ). Close

• 34. [Article] Management of over-utilized streams : lessons from the Tualatin Watershed

  Published March 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog...

  Citation × Citation Citation Abstract Copy Title: Management of over-utilized streams : lessons from the Tualatin Watershed Author: Oregon State University. Water Resources Research Institute, Oregon State University. Extension Service Published March 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Management of over-utilized streams : lessons from the Tualatin Watershed Author: Oregon State University. Water Resources Research Institute, Oregon State University. Extension Service Published March 1994. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 35. [Article] South Fork Alsea watershed analysis

  Citation × Citation Citation Abstract Copy Title: South Fork Alsea watershed analysis Title: South Fork Alsea watershed analysis Close

• 36. [Article] Kilchis watershed analysis

  This analysis was performed for two reasons: 1) the KWG needed a way to focus and synthesize the results of applied research on the condition and trends of natural resources, and the factors affecting ...

  Citation × Citation Citation Abstract Copy Title: Kilchis watershed analysis Author: Follansbee, Bruce, Stark, Ann This analysis was performed for two reasons: 1) the KWG needed a way to focus and synthesize the results of applied research on the condition and trends of natural resources, and the factors affecting those resources; and 2) a detailed watershed analysis was needed to supplement watershed assessments planned for the region. Title: Kilchis watershed analysis Author: Follansbee, Bruce, Stark, Ann This analysis was performed for two reasons: 1) the KWG needed a way to focus and synthesize the results of applied research on the condition and trends of natural resources, and the factors affecting those resources; and 2) a detailed watershed analysis was needed to supplement watershed assessments planned for the region. Close

• 37. [Article] Necanicum River watershed assessment

  In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is ...

  Citation × Citation Citation Abstract Copy Title: Necanicum River watershed assessment Author: E&S Environmental Chemistry, Inc., Sullivan, Timothy J., Snyder, Kai U., Raymond, Richard B., Gilbert, Erin H., Moore, Deian L. In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is impacting aquatic resources. Title: Necanicum River watershed assessment Author: E&S Environmental Chemistry, Inc., Sullivan, Timothy J., Snyder, Kai U., Raymond, Richard B., Gilbert, Erin H., Moore, Deian L. In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is impacting aquatic resources. Close

• 38. [Article] State of the South Slough and Coastal Frontal watersheds

  This State of the Watersheds assessment is a summary of newly collected and existing data which describe the environmental and socioeconomic conditions in Coos Bay’s South Slough and Coastal Frontal watersheds. ...

  Citation × Citation Citation Abstract Copy Title: State of the South Slough and Coastal Frontal watersheds Author: Cornu, Craig E., Hamilton, Judy, Souder, Jon This State of the Watersheds assessment is a summary of newly collected and existing data which describe the environmental and socioeconomic conditions in Coos Bay’s South Slough and Coastal Frontal watersheds. This is the first attempt to compile these data into a summary report. The assessment, also accessible online (www.partnershipforcoastalwatersheds.org), is intended to be updated periodically to give our community a dynamic resource with which to track the health of our community and watersheds over time. Title: State of the South Slough and Coastal Frontal watersheds Author: Cornu, Craig E., Hamilton, Judy, Souder, Jon This State of the Watersheds assessment is a summary of newly collected and existing data which describe the environmental and socioeconomic conditions in Coos Bay’s South Slough and Coastal Frontal watersheds. This is the first attempt to compile these data into a summary report. The assessment, also accessible online (www.partnershipforcoastalwatersheds.org), is intended to be updated periodically to give our community a dynamic resource with which to track the health of our community and watersheds over time. Close

• 39. [Article] Watershed and Aquatic Habitat Effectiveness Monitoring: A Synthesis of a Technical Workshop

  This is a synthesis of workshop notes to reflect the collection of ideas and concepts discussed on the days of the workshop. It does not necessarily reflect the opinions of the IMST, OWEB or any individual ...

  Citation × Citation Citation Abstract Copy Title: Watershed and Aquatic Habitat Effectiveness Monitoring: A Synthesis of a Technical Workshop Author: Independent Multidisciplinary Science Team (Or.) This is a synthesis of workshop notes to reflect the collection of ideas and concepts discussed on the days of the workshop. It does not necessarily reflect the opinions of the IMST, OWEB or any individual workshop participant. Information on report preparation is included in the report. Title: Watershed and Aquatic Habitat Effectiveness Monitoring: A Synthesis of a Technical Workshop Author: Independent Multidisciplinary Science Team (Or.) This is a synthesis of workshop notes to reflect the collection of ideas and concepts discussed on the days of the workshop. It does not necessarily reflect the opinions of the IMST, OWEB or any individual workshop participant. Information on report preparation is included in the report. Close

• 40. [Article] MidCoast sixth field watershed assessment : final report

  The study area for this assessment is composed of the Alsea, Salmon, Siletz, Yachats, and Yaquina River watersheds and those watersheds that drain directly to the ocean between Cascade Head and Cape Creek ...

  Citation × Citation Citation Abstract Copy Title: MidCoast sixth field watershed assessment : final report Author: Garono, Ralph J., Brophy, Laura The study area for this assessment is composed of the Alsea, Salmon, Siletz, Yachats, and Yaquina River watersheds and those watersheds that drain directly to the ocean between Cascade Head and Cape Creek at Heceta Head (Ocean Tributaries). Wherever possible, 1:24,000 uniform scale geographic information system (GIS) data that covered the entire study area were used in this assessment. Goals of this study include, (1) a summary of current conditions for each 6th field watershed; and (2) recommendations for monitoring and management actions for prioritized 6th field watersheds. Title: MidCoast sixth field watershed assessment : final report Author: Garono, Ralph J., Brophy, Laura The study area for this assessment is composed of the Alsea, Salmon, Siletz, Yachats, and Yaquina River watersheds and those watersheds that drain directly to the ocean between Cascade Head and Cape Creek at Heceta Head (Ocean Tributaries). Wherever possible, 1:24,000 uniform scale geographic information system (GIS) data that covered the entire study area were used in this assessment. Goals of this study include, (1) a summary of current conditions for each 6th field watershed; and (2) recommendations for monitoring and management actions for prioritized 6th field watersheds. Close